Compensating device for looms



July 1, 1930.

CJSCHAUM v 1,768,934

COMPENSATING DEVICE FOR LOOMS Filed Jan. 8, 1929 INVEN TOR. 7-

A TTORN Patented July 1, 1930 uN rEosrAT -s PATENT OFFICE cant season, or rnrmnnnrnm, rEN'NsYLv NIA, AssIGNoa T FLETCHER wonxs, INCORPORATED, or PHILADELPHIA, PENNSYLVANIA, A CORPORATION or PENIL SYLVAN IA.

. coMrENsa'rINe nnvron FORLOOMSV Application filed January s, 1929. Serial .No. 330,988.

In narrow fabriclooms as now constructed the batten straps are most taut when the shuttles are midway of their stroke due to the" angularity of the straps at this instant.- a

' It is-of advantage, however, to have the straps most taut at the ends of the stroke of the shuttles instead ofmidway of the shuttle stroke and one of the objects of the present invention is to provide such a construction.

A further object of theinvention is the provision of a compensating devicewhich will produce the above-mentioned results, wherein the compensating device is so constructed and arranged that if desired the batten straps maybe under practically uniform tension throughout the complete revolution of the cranks by :which the-batten is operated. Injother words my compensating device may be adjusted so that the strap tension is greatest at the ends of the stroke of the shuttles as: distinguished from existing constructions in which the tension is greatest when the shuttles are midway of their stroke, or as just mentioned I may so adjust the compensating device that the strap tension is practically uniform throughout theentire shuttle stroke.

The incorporation of; my compensating device in a loom necessitates very little change in the existing structure.

Briefly I provide for bodily movement of the idler pulleys for thebatten straps, this movement being controlled and-directed by my apparatus so asto allow the pulleys or idlers to oscillate in accordance with the movement of the batten; This oscillation canbe varied and so set originally asto produce uniform tension in the batten straps, if .desired,throughout the entire range of movement ,of the batten, that is to say throughout the complete revolution of the cranks by which the straps are moved; or,'as-above mentioned, the device can be so set that the .straps'will'be underless'tension midway of the sh'uttlestroke and under greatest ten- 'sion at the ends of theshuttle stroke. If a batten with a difierent stroke is placed in the loom my invention provides for adjusting the stroke of the idlers to compensate for the changed angularity of the batten straps.

In the accompanying drawings I have shown only sufii-cient of the loom structure to properly illustrate my invention, it being understood that the driving mechanism in etc., isof usual construction familiar to any one skilled in this art. Y

, In the accompanying drawings, Fig.1 is a side elevational'view of an embodiment of 4; elfect a drive of the shuttles diagrammatically shown atS in a well understood manner, for example, as shown in PatentNo. 460,662, of October 6, 1 891, or Patent No. 607,486, of July 19,1898.

In looms as now constructed it is customary topass the batten straps3 and 4 about a 'cludingfthe shuttle operating mechanism.

pair of idler pulleys, and hence as the batten l is rocked on its pivot 2, due to the action of the cranks 5 it will be obvious that the tension in the straps 3 and 4 will vary depending upon the position of the batten 1 at any particular instant. Actually, in existing loom structures, the tension on the bat-ten straps or belts is greatest when the shuttles 8 are midway of their stroke. As pointed out above this is objectionable and is overcome by the present invention.

As distinguished from existing structures the present invention providest-wo pulleys designated 9' and 10, respectively, these pulleys being pivotally mounted. Actually in the construction illustrated the pulleys 9 and 10 are carried in suitable bearings in arms or strap 4 passes about the pulley Qwhile the belt. orstrap 3 passes about the ulley 1 0. I have beenreferring to the mem ers 3 and t'as straps or belts, it is to be understood that this drive may be a chain if desired or any other form of flexible drive."

'11 and 12 pivoted a 13 and 14. The belt too Inline with the fulcrums of the idler pulleys 9 and 10 is pivoted a slotted arm 15. A convenient construction for the pivoting of the pulleys 9 and 10 as well as the arm is to provide a short shaft 16, mounting the same .in the standards 17 and 18, the upper ends of which provide the pivotal bearings if desired, the members 12- and 15 might be constructed integrally with each other.

.The batten laysword as above pointed out is pivoted at 2 and on this same pivot I mount an arm or crank 19 in such fashion that crank 19 and the batten laysword which shuttles.

I shall designate 20 will rock as a unit about the pivot 2. This arm or crank 19 is connect ed by .a link 21 to the slotted arm 15. The end of the linkQl is anchored insadjusted position to the slotted arm 15, but its position may be changed with respect to this arm by merely loosening the bolt 22 by which the link and slotted arm are attached to each other, and then rocking the link to a new position so as to vary the movement of the pulleys 9 and 10 as will be presently pointed out.

The operation of-this arrangement is very simple and will be clearly understood from an inspection of the drawings, it being obvious thatas' the batten 1 isrocked the pulleys 9 and 10 will be rocked in their bearings 13 and 14-so as to compensate for variation in tension which would otherwise exist in the belts 3 and 4 due to the angularity of the'batten 1, as it assumes its various positions in operation, with respect to the pulleys 9 and'lO. Obviously by adjusting the link 21 inthe slotted arm 15 the idler pulleys 9 and 10 may be so set as to produce any desired tension in the straps 3 and 4. Thatis to say if uniform tension throughout the movement of the batten 1 and hence the entire stroke of the shuttles 8 is desired the idlers '9 and 10 may be so set as to produce this uniform tension, or as pointed out above if preferable these idlers may be set to have the tension in the straps or belts 3 and 4 greatest at the ends of the strokes of the This arrangement is applicable not only to a loom in which the batten or beam has a V i'constant stroke but is applicable as readily when a battenwith a different stroke is put in the, loom as it is merely necessary to relocatethe link 21.

It will be obvious from the foregoing, therefore, that I have provided 'a compensating device for a shuttle motion in which the angularity of the straps 3 and 4 is compensated for by providing a construction in which the idler pulleys about which the straps 3 and 4 are passed are given a slight reciprocating motion so that these pulleys will move backward toward the cranks 5 as the batten beats back and the shuttles move across the space, the idlers returning to their forward position as the batten beats forward.

t will be seen also that with my device I may compensate any desired amount simply by changing the setting of the device to vary the oscillation of the idlers 9 and 10.

Variations can be made in the details of construction above. described without, however, departing from the spirit and scope of my invention. For instance,.idlers 9 and 10 mi ghtbe pulled forward with a belt or chain, the shuttle motion straps 3 and 4 pulling them backward. On the other hand the desired motion could be given the idlers through acam, an eccentric or by a strap or cable wrapped around a drum orcam. All of these variations, however, come within the scope of my invention which broadly considered consists in providing a compensating device operating to compensate for the angularity of the batten. straps 3 I and 4 at the different positions of the batten 1, whereby the tension in the straps 3 and 4 may be adjusted as desired to make the strap tension practically uniform or to have these straps taut at the ends of the shuttle stroke and slack midway of the shuttle stroke, if desired.

VVhatIclaim is e 1. In a'loom comprising a shuttle, motion including shuttle driving straps, a batten to which .said straps are connected, and idler pulleys engaged by said straps and adapted to be moved bodily and automatically in the operation of the loom to regulate the. tension in the shuttle straps.

2. In a loom comprising a shuttle motion including shuttle driving straps, a batten to which said straps are attached, and idlers for said straps, means for imparting bodily movement to said idlers, and means for regulating the amount of movement to be given said idlers whereby the tension in the shuttle driving straps is regulated.

3. Ina loom having a shuttle motion comprising shuttle' driving straps, a batten, an idler pulleyfor each strap, and a pivotal mounting for said pulleys whereby as the batten is rocked the idlers will be given a corresponding bodily movement/to compensate for changing tension in the straps.

4. Ina loom having a shuttle'motion comprising a pair of shuttle driving straps, a

batten'to which the straps are connected, an

idler pulley'for 61Cl1"Sl'/I2LP;3, plV0t9il mounting for said pulleys and a link connection between the batten and the pulleys whereby the pulleysare moved bodily about their pivot to compensate'for changing tension in the shuttle driving straps as the batten is actuated.

5. A loom comprising a pair ofshuttle- I driving straps, a batten'to which said straps are connected, a pair of idler pulleys cooperating with said straps, a pivotal mounting for said pulleys, an arm on said pivot, a lever attached to said batten and rocking about the pivot of the batten and a link connecting said lever and said arm whereby as the batten is rocked the pulleys will be given a corresponding movement.

- 6. In a loom provided with a shuttle motion comprising shuttle driving mechanism,

a batten, and bodily movable positive compensating mechanism cooperatingwith said shuttle driving mechanism to regulate the tension in the latter.

7. In a loom provided with a shuttle motion comprising shuttle driving mechanism,

a batten, and bodily movable pivotally mounted positive compensating mechanism cooperating with said shuttle driving mechanism to regulate the tension in the latter.

8. In a loom provided with a shuttle motion comprising shuttle driving mechanism, a batten, and pivotally mounted positive compensating mechanism cooperating with said shuttle driving mechanism for regulating the tension in the shuttle driving mechanism, said compensating mechanism being controlled by said batten.

9. In a loom provided with a shuttle mopositive means intermediate the crank and batten and cooperating with said straps for compensating for variation in tension of said straps during rotation of said crank an pivoting of said batten.

This specificationsigned this 7th day of January, 1929.

CARL SCI-IAUM. 

